Pipe-mold.



E. L. MAAG.

PIPE MOLD.

APPLICATION FILED Nov. I8, 190s.

Patented Sept. 28,1909.

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EDWARD L. MAAG, OF CHILLICOTHE, OHIO.

PIPE-MOLD.

Application filed November 18, 1908.

To all lwhom fit may concern:

Be it known that I, EDWARD L. Maas, citizen of the United States,residing at Chillicothe, in the county of Ross and State of Ohio, haveinvented certain new and useful Improvements in Pipe-Molds, of which thefollowing is a specification.

The present invention relates to certain new and useful improvements inthe construction of that type of molds which are employed for formingpipes from concrete or other plastic material, and the object of theinvention is the provision of a pipe mold embodying novel means forexpanding and contracting the core.

The invention further contemplates a mold of this character which isinexpensive in its construction and which can be easily operated by asingle laborer.

lVith these and other objects in view that will more fully appear as thedescription proceeds, the invention consists in certain constructionsand arrangements of the parts that I shall hereinafter fully describeand claim.

For a full understanding of the invention and the merits thereof, and toacquire a knowledge of the details of construction, reference is to behad to the following description and accompanying` drawing, iny

which:

Figure l is a vertical sectional view through a pipe mold embodying theinvention; Fig. 2 is a top plan view of the mold, portions being brokenaway; Fig. 8 is a detached perspective view of the jacket adapted to fitaround the core; Fig. 4 is a perspective view of the core, showing amodification; Fig. 5 is a detail perspective view of the pallet ring;Fig. G is an enlarged detail view of one of the fastening members forsecuring the sections of the outer case together.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawing by the samereference characters.

Referring to the drawing, the numeral l designates the core of the mold,the said core being in the nature of a hollow shell and being providedupon one side with a longitudinal slit 2 so that it can be expanded andcontracted by moving the edges of the slit either away from or towardeach other, as required. In the preferred construction, this core isSpecification of Letters Patent.

Patented Sept. 2S, 1909.

Serial No. 463,225.

formed of sheet metal and is reinforced at its upper and lower ends bythe split rings which are secured thereto. These ringsI may beconveniently formed of angle irons.` and secured to the split ends ofthe rings are the inwardly projecting lugs et, a pair of these lugsbeing located at each end of the core, and the said lugs abuttingagainsteach other when the core is contracted. The opposing edges ofeach pair of lugs et are formed with the corresponding notches Llr whichcooperate with each other to form a radially elongated opening.Extending through these openings is a flattened shaft 5, one end ofwhich is extended laterally to provide a handle lllhen the flattenedshaft is turned so that the sides thereof have a radial direction, thesaid shaft tits accurately within the notches v-l-.a and permits theedOes of the slit to come together. However, when the shaft is turnedthrough a quarter revolution so that the sides thereof are disposed at aright angle to the radius, the lugs 4 are wedged apart and the colre lthereby expanded.

A pair of arms are secured to the core l at the top and bottom thereofadjacent one of the edges of the slit. 2, so as to project beyond saidedge and engage the opposite edge of the slit. These arms serve toprevent the edges of the slit from springing either in or out when theshaft 5 is turned. Fitting removably around the core l is a jacket Twhich is also formed of sheet material and has overlapping edges so thatit can be readily expanded or contracted to fit the core. This jacket isdesigned to remain within the concrete pipe after the core has beenremoved, and this permits the core to be removed much sooner than wouldotherwise be the case. It will also be apparent that this jacket willextend over the slit 2 of the core so as to cover the same and preventthe plastic material entering the core when the mold is in use. The ringS which serves as a pallet upon which the concrete is molded, litsaround the core and jacket at one end thereof, and is engaged by anouter shell which is spaced from the core. This outer shell is formed ina pair of semicylindrical sections 9, the outer edges of the saidsections being reinforced by the strips l0, while the meeting edges ofthe sections are provided with the angle irons ll. Corresponding flangesl2 project outwardly from the angle irons ll upon the two sections ofthe shell, one of the flanges of each pair'being formed with a stud 13designed to enter an opening in the opposite liange to accuratelyposition the sections and hold them against relative displacen'ient whenlocked together. A lever let is also pivoted upon one of the ianges l2ot' each pair, the said lever being provided with an arm lita designedto engage the opposite [lange and to lock the two tlanges together whenthe lever is swung into a predetermined position. s shown on thedrawing, the sections of the shell are released `when the levers areswung upwardly, and

locked together when the levers are swung downwardly.

modilication ot the invention is shown in Fig. et, in which one ot theedges, of the slit in the core overlaps the opposite edge as indicatedat 2a. With this construction, it will be obvious lthat it is notnecessary to use the jacket, since the slit is always closed, even whenthe core is expanded.

In the preferred embodiment otI the invention the split rings and sheetmetal covering of the core have a spring action which nor# mally retainsthe core in a contracted condition. l't will thus be obvious that whenremoving the core from the mold itis merely necessary to turn the shaftthrough a quarter revolution and thereby permit the edges ot the slit tospring together.

Having thus described the invention, what l claim is:

l. A core for a pipe mold, comprising a hollow shell provided upon oneside with a slit so that the core can be expanded and contracted bymoving the edgesot the slit either away lroin or toward each other,corresponding lugs projecting 'inwardly trom the shell upon oppositesides ot the slit, and a shatt provided with a flattened portion forcooperation wit-h the lugs to spread them apart.

A core lfor a pipe mold, comprising a hollow shell provided npon oneside with a slit so that it can be expanded and contracted by moving theedges of the slit away from or toward each other, positioning armsprojecting from one edge of the slit and loosely engaging the .oppositeedge, corresponding lugs projecting trom the shell on opposite sides otthe slit, and a shaft formed with a tlattened portion for cooperationwith the lugs to spread them apart.

3. core for pipe molds, comprising a hollow shell provided upon one sidewith a slit so that it can he expanded and contracted by moving theedges of the slit away from or toward each other, corresponding lugsprojecting inwardly from the shell upon opposite sides otl the slit andprovided upon their adjacent et ges with notches, and a tiattened shaftreceived within the notches and adapted to cooperate with the lugs tospread them apart.

d. A core for pipe molds, comprising a shell provided upon one side witha slit so that it can be expanded and contracted by moving the edges ofthe slit either away from or toward each other, corresponding lugs projecting from the shell upon opposite sides of the slit, a shaft formedwith a flattened portion adapted to cooperate with the lugs to spreadthem apart, and a removable jacket fitted upon the exterior of the coreand extending over the slit therein.

In testimony whereof attix my signature in presence ot two witnesses.

EDWARD L. Maite. [Le] Witnesses:

Umar G. HYDE, (have L. lULLnN.

